Genetic Variant NM_014495.4:c.63A>C (chr1-62597629-A-C) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_014495.4(ANGPTL3):c.63A>C(p.Gln21His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000212 in 1,460,598 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000021 ( 1 hom. )

Consequence

ANGPTL3
NM_014495.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.93

Variant links:

Genes affected

ANGPTL3 (HGNC:491): (angiopoietin like 3) This gene encodes a member of a family of secreted proteins that function in angiogenesis. The encoded protein, which is expressed predominantly in the liver, is further processed into an N-terminal coiled-coil domain-containing chain and a C-terminal fibrinogen chain. The N-terminal chain is important for lipid metabolism, while the C-terminal chain may be involved in angiogenesis. Mutations in this gene cause familial hypobetalipoproteinemia type 2. [provided by RefSeq, Aug 2015]

ANGPTL3 links:

DOCK7 (HGNC:19190): (dedicator of cytokinesis 7) The protein encoded by this gene is a guanine nucleotide exchange factor (GEF) that plays a role in axon formation and neuronal polarization. The encoded protein displays GEF activity toward RAC1 and RAC3 Rho small GTPases but not toward CDC42. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]

DOCK7 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.044087976).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ANGPTL3	NM_014495.4 link	c.63A>C	p.Gln21His	missense_variant	Exon 1 of 7	ENST00000371129.4	NP_055310.1	Q9Y5C1
DOCK7	NM_001367561.1 link	c.1683-11005T>G		intron_variant	Intron 14 of 49	ENST00000635253.2	NP_001354490.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ANGPTL3	ENST00000371129.4 link	c.63A>C	p.Gln21His	missense_variant	Exon 1 of 7	1	NM_014495.4	ENSP00000360170.3		Q9Y5C1
DOCK7	ENST00000635253.2 link	c.1683-11005T>G		intron_variant	Intron 14 of 49	5	NM_001367561.1	ENSP00000489124.1		Q96N67-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000480

AC:

AN:

250224

Hom.:

AF XY:

0.0000739

AC XY:

AN XY:

135256

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000392

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000212

AC:

AN:

1460598

Hom.:

Cov.:

AF XY:

0.0000330

AC XY:

AN XY:

726640

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000659

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3476

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Mar 01, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.63A>C (p.Q21H) alteration is located in exon 1 (coding exon 1) of the ANGPTL3 gene. This alteration results from a A to C substitution at nucleotide position 63, causing the glutamine (Q) at amino acid position 21 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.58

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.067

Eigen

Benign

-0.42

Eigen_PC

Benign

-0.25

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.51

M_CAP

Benign

0.0063

MetaRNN

Benign

0.044

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.6

PrimateAI

Benign

0.24

PROVEAN

Benign

-0.81

REVEL

Benign

0.060

Sift

Benign

0.060

Sift4G

Benign

0.11

Polyphen

0.0020

Vest4

0.11

MutPred

0.21

Gain of catalytic residue at D22 (P = 0.0547);

MVP

0.44

MPC

0.025

ClinPred

0.039

GERP RS

3.4

Varity_R

0.058

gMVP

0.50

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over